Question: What is the namesake of the Riemann zeta function, which has the Cauchy–Euler equation in its significant works?
Paraphrase: What is the namesake of the Riemann zeta work, which has the Cauchy–Euler condition in its noteworthy works?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q187235 wdt:P138 ?answer . ?answer wdt:P800 wd:Q1196465}
Answer: Leonhard Euler